The BBC have revealed an official synopsis for the fifth episode of Series 10, Oxygen, which is written by Jamie Mathieson.
The Doctor, Bill and Nardole answer a distress call in deep space, and find themselves trapped on board space station Chasm Forge. All but four of the crew have been murdered – and the dead are still walking!
In a future where oxygen is sold by the breath, and space suits are valued more highly than their occupants, the TARDIS crew battle for survival against the darkest evil of all…
Oxygen airs Saturday 13th May on BBC One.